Manufacture of plumbers  traps



(No Model.)

R. CLARKE.

MANUFACTURE OF PLUMBERS TRAPS.

Patented Mar. 12-, 1889.

UNITED STATES PATENT @rrrcn.

ROBERT CLARKE, OF GRAVESEND, NEW YORK.

MANUFACTURE OF PLUMBERS TRAPS.

SEECIFICATION forming part of Letters Patent No. 899,243, dated March 12, 1889.

Application filed October 12, 1888. Serial No. 287,909. (No modeld To (@ZZ whom it 71mg concern.-

Be it known that 1, ROBERT CLARKE, a citizen of theUnited States, residing at Gravesend, King's county, New York, have invented certain new and useful Improvements in the former or mandrel, instead of tapering to a smaller neck, like the other end, as in the mandrel referred to, and shown in my said patent, is rounded, as shown in Fig. 3, or flat,

as shown in Fig. 5, to correspond to the form of Manufacture of Plumbers Traps, of which the following is a specification.

My invention relates to plumbers traps; and it cons of a trap having a body composed practically of one piece of soft metal contracted and closed by a cap at one end, and with a bottom forming partof the body and provided with inlet and outlet pipes, and in the mode hereinafter set forth of making such traps.

In the accompanying drawings, Figures 1 and 2 are exterior views showing ditlerent forms in which my improved trap may be is a longitudinal section illusmade. Fig. i) crating the form. of mandrel. upon which the trap-body is spun and the method of forming the same.

Fig. l is a sectional view showing the body spun upon the mandrel with the key in the act of being detached.

tra-tes the form of mnnd rel employed in mak- 5 ing a body with a [lat bot tom. Fig. o is an end view of the mandrel, the core in section. I

The form of the trap to which my inven- 1 tion more particularly relates is illustrated in sides of the body, and pipes are connected to l and 2, the said trap havinga body, A,

contracted at one end, to which is adapted a j. detachable cap, B, and closed at the opposite through said openings.

end, which maybe rounded, as shown in Fig. 1, or fiat, as shown in Fig.

In order to avoid the necessity of makingthe body and closed end of two pieces of metal soldered together along their meeting; edges, and to secure the advantages resulting from a body consisting of one continuous piece of metal, I construct the trap in a manner which I will now proceed to describe, making; use of the end of the trap-body, and the end of the tube F projecting beyond this portion of the mandrel is spun down, so as to completely cover the said end, with the exception of that portion immediately opposite the point. of the tail-stock, thus forming the bottom and side in one piece. The key-section a ot' the former is held in its position by the core I), and when the latter is withdrawn the hey-section is moved down to the position shown in Fig. 4 and drawn out of the body through the con.- tl'acted open end, after which the other sections are withdrawn in succession. The hollow body of one continuous piece of lead is thus formed with a contracted neck at one end and with a bottom, 0, in one piece with the other portions of the body, closed with the exception of a small opening, at the center, and this opening is filled or plugged by means of solder, or by burning or by weldin; to the bottom portion a piece or plug i soft metal, thereby forming a practically-conti'nuous body with a closed bottom in one piece. Suitable openings are now made in the the body to form the inletpipe (Z and the outlet-pipe c, communicating with the body By constructingthe trap in the manner above described I avoid the necessity of sol- I (lei-ingcaps, covers, orbotiom pieces in the body of the cap, for the purpose of closing a sectional mandrel somewhat similar in charactor to that illustrated in Letters Patent granted to me September 1883, No. 285,574. The said mandrel or former C is mount-ed between the headstock and tail-stock E of a 1 the same at one end, the trap is stronger and more durable and less likely to leak, it can be more cheaply made than those of the ordinary construction, and may be produced without the employment oi? skilled labor.

\Vithout limiting myself to the precise construction and arrangement oi? parts shown, I claim 1. As a new article oi. man u'l'actnrc, a pin mbers trap having a body coi'ltracted at one end i to form a neck provided with a cap, ll, and at the other end to form the bot-tom in one piece i l l with the body, with a central closing-plug at the bottom and with inlet and outlet pipes, substantially as set forth.

2. The within-described improvement in the i In testimony whereof I have signed my name i o manufacture of plumbers traps, the same to this specification in thepresenceof two snbconsisting in spinning down one end of a soft scribingwitnesses. metal tube to form the contracted neck of a '5 trap-body in spinning down the other end ROBERT CLARKE.

and forming a bottom in one piece with the i body to close such end, with the exception of Vitnesses:

a central opening, and then plugging; said CHAPLIN MOORHEAD, opening, substantially as setforth. JOHN MCMULLAN. 

